<?
class zip {

    var $datasec, $ctrl_dir = array();
    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
    var $old_offset = 0;
    var $dirs = Array(".");
    var $chk_zip=true;
    function zip() {
        if (!function_exists('gzopen')) {
            $this->chk_zip=false;
        }
    }
    function get_List($zip_name) {
        $zip = @fopen($zip_name, 'rb');
        if(!$zip) return(0);
        $centd = $this->ReadCentralDir($zip,$zip_name);

        @rewind($zip);
        @fseek($zip, $centd['offset']);

        for ($i=0; $i<$centd['entries']; $i++) {
            $header = $this->ReadCentralFileHeaders($zip);
            $header['index'] = $i;
            $info['filename'] = $header['filename'];
            $info['stored_filename'] = $header['stored_filename'];
            $info['size'] = $header['size'];
            $info['compressed_size']=$header['compressed_size'];
            $info['crc'] = strtoupper(dechex( $header['crc'] ));
            $info['mtime'] = $header['mtime'];
            $info['comment'] = $header['comment'];
            $info['folder'] = ($header['external']==0x41FF0010||$header['external']==16)?1:0;
            $info['index'] = $header['index'];
            $info['status'] = $header['status'];
            $ret[]=$info;
            unset($header);
        }
        return $ret;
    }

    function Add($files,$compact) {
        if(!is_array($files[0])) $files=Array($files);

        for($i=0;$files[$i];$i++) {
            $fn = $files[$i];
            if(!in_Array(dirname($fn[0]),$this->dirs))
                $this->add_Dir(dirname($fn[0]));
            if(basename($fn[0]))
                $ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact);
        }
        return $ret;
    }

    function get_file() {
        $data = implode('', $this -> datasec);
        $ctrldir = implode('', $this -> ctrl_dir);

        return $data . $ctrldir . $this -> eof_ctrl_dir .
                pack('v', sizeof($this -> ctrl_dir)).pack('v', sizeof($this -> ctrl_dir)).
                pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";
    }

    function add_dir($name) {
        $name = str_replace("\\", "/", $name);
        $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";

        $fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
        $fr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).pack("V", 0);
        $this -> datasec[] = $fr;

        $new_offset = strlen(implode("", $this->datasec));

        $cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
        $cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
        $cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 );
        $ext = "\xff\xff\xff\xff";
        $cdrec .= pack("V", 16 ).pack("V", $this -> old_offset ).$name;

        $this -> ctrl_dir[] = $cdrec;
        $this -> old_offset = $new_offset;
        $this -> dirs[] = $name;
    }

    function add_File($data, $name, $compact = 1) {
        $name     = str_replace('\\', '/', $name);
        $dtime    = dechex($this->DosTime());
        if($data==''&&file_exists($name)&&!is_dir($name)) {
            $dfp=fopen($name,"rb");
            $data=fread($dfp,filesize($name));
            fclose($dfp);
        }
        $hexdtime = '\x' . $dtime[6] . $dtime[7].'\x'.$dtime[4] . $dtime[5]
                . '\x' . $dtime[2] . $dtime[3].'\x'.$dtime[0].$dtime[1];
        eval('$hexdtime = "' . $hexdtime . '";');

        if($compact)
            $fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$hexdtime;
        else $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00".$hexdtime;
        $unc_len = strlen($data);
        $crc = crc32($data);

        if($compact) {
            $zdata = gzcompress($data);
            $c_len = strlen($zdata);
            $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
        }else {
            $zdata = $data;
        }
        $c_len=strlen($zdata);
        $fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
        $fr .= pack('v', strlen($name)).pack('v', 0).$name.$zdata;

        $fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);

        $this -> datasec[] = $fr;
        $new_offset        = strlen(implode('', $this->datasec));
        if($compact)
            $cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";
        else $cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";
        $cdrec .= $hexdtime.pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);
        $cdrec .= pack('v', strlen($name) ).pack('v', 0 ).pack('v', 0 );
        $cdrec .= pack('v', 0 ).pack('v', 0 ).pack('V', 32 );
        $cdrec .= pack('V', $this -> old_offset );

        $this -> old_offset = $new_offset;
        $cdrec .= $name;
        $this -> ctrl_dir[] = $cdrec;
        return true;
    }

    function DosTime() {
        $timearray = getdate();
        if ($timearray['year'] < 1980) {
            $timearray['year'] = 1980;
            $timearray['mon'] = 1;
            $timearray['mday'] = 1;
            $timearray['hours'] = 0;
            $timearray['minutes'] = 0;
            $timearray['seconds'] = 0;
        }
        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) |     ($timearray['mday'] << 16) | ($timearray['hours'] << 11) |
                ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
    }

    function Extract ( $zn, $to, $index = Array(-1) ) {
        $ok = 0;
        $zip = @fopen($zn,'rb');
        if(!$zip) return(-1);
        $cdir = $this->ReadCentralDir($zip,$zn);
        $pos_entry = $cdir['offset'];
        if(!is_array($index)) {
            $index = array($index);
        }
        for($i=0; $index[$i];$i++) {
            if(intval($index[$i])!=$index[$i]||$index[$i]>$cdir['entries'])
                return(-1);
        }
        for ($i=0; $i<$cdir['entries']; $i++) {
            @fseek($zip, $pos_entry);
            $header = $this->ReadCentralFileHeaders($zip);
            $header['index'] = $i;
            $pos_entry = ftell($zip);
            @rewind($zip);
            fseek($zip, $header['offset']);
            if(in_array("-1",$index)||in_array($i,$index))
                $stat[$header['filename']]=$this->ExtractFile($header, $to, $zip);
        }
        fclose($zip);
        return $stat;
    }



    function ReadFileHeader($zip) {
        $binary_data = fread($zip, 30);
        $data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);

        $header['filename'] = fread($zip, $data['filename_len']);
        if ($data['extra_len'] != 0) {
            $header['extra'] = fread($zip, $data['extra_len']);
        }
        else {
            $header['extra'] = '';
        }

        $header['compression'] = $data['compression'];
        $header['size'] = $data['size'];
        $header['compressed_size'] = $data['compressed_size'];
        $header['crc'] = $data['crc'];
        $header['flag'] = $data['flag'];
        $header['mdate'] = $data['mdate'];
        $header['mtime'] = $data['mtime'];

        if ($header['mdate'] && $header['mtime']) {
            $hour=($header['mtime']&0xF800)>>11;
            $minute=($header['mtime']&0x07E0)>>5;
            $seconde=($header['mtime']&0x001F)*2;
            $year=(($header['mdate']&0xFE00)>>9)+1980;
            $month=($header['mdate']&0x01E0)>>5;
            $day=$header['mdate']&0x001F;
            $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
        }
        else {
            $header['mtime'] = time();
        }

        $header['stored_filename'] = $header['filename'];
        $header['status'] = "ok";
        return $header;
    }

    function ReadCentralFileHeaders($zip) {
        $binary_data = fread($zip, 46);
        $header = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);

        if ($header['filename_len'] != 0)
            $header['filename'] = fread($zip,$header['filename_len']);
        else $header['filename'] = '';

        if ($header['extra_len'] != 0)
            $header['extra'] = fread($zip, $header['extra_len']);
        else $header['extra'] = '';

        if ($header['comment_len'] != 0)
            $header['comment'] = fread($zip, $header['comment_len']);
        else $header['comment'] = '';

        if ($header['mdate'] && $header['mtime']) {
            $hour = ($header['mtime'] & 0xF800) >> 11;
            $minute = ($header['mtime'] & 0x07E0) >> 5;
            $seconde = ($header['mtime'] & 0x001F)*2;
            $year = (($header['mdate'] & 0xFE00) >> 9) + 1980;
            $month = ($header['mdate'] & 0x01E0) >> 5;
            $day = $header['mdate'] & 0x001F;
            $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
        }
        else {
            $header['mtime'] = time();
        }
        $header['stored_filename'] = $header['filename'];
        $header['status'] = 'ok';
        if (substr($header['filename'], -1) == '/')
            $header['external'] = 0x41FF0010;
        return $header;
    }

    function ReadCentralDir($zip,$zip_name) {
        $size = filesize($zip_name);
        if ($size < 277) $maximum_size = $size;
        else $maximum_size=277;

        @fseek($zip, $size-$maximum_size);
        $pos = ftell($zip);
        $bytes = 0x00000000;

        while ($pos < $size) {
            $byte = @fread($zip, 1);
            $bytes=($bytes << 8) | ord($byte);
            if (($bytes & 0xFFFFFFFF) == 0x504b0506) {
                $pos++;
                break;
            } $pos
            ++;
        }

        $fdata=fread($zip,18);

        $data=@unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',$fdata);

        if ($data['comment_size'] != 0) $centd['comment'] = fread($zip, $data['comment_size']);
        else $centd['comment'] = '';
        $centd['entries'] = $data['entries'];
        $centd['disk_entries'] = $data['disk_entries'];
        $centd['offset'] = $data['offset'];
        $centd['disk_start'] = $data['disk_start'];
        $centd['size'] = $data['size'];
        $centd['disk'] = $data['disk'];
        return $centd;
    }

    function ExtractFile($header,$to,$zip) {
        $header = $this->readfileheader($zip);

        if(substr($to,-1)!="/") $to.="/";
        if($to=='./') $to = '';
        $pth = explode("/",$to.$header['filename']);
        if('/'==substr($to,0,1)) {
            $pth[0]="/".$pth[0];
        }
        $mydir = '';
        for($i=0;$i<count($pth)-1;$i++) {
            if(!$pth[$i]) continue;
            $mydir .= $pth[$i]."/";
            if((!is_dir($mydir) && @mkdir($mydir,0777)) || (($mydir==$to.$header['filename'] || ($mydir==$to && $this->total_folders==0)) && is_dir($mydir)) ) {
                @chmod($mydir,0777);
            }
        }

        if(strrchr($header['filename'],'/')=='/') return;

        if (!($header['external']==0x41FF0010)&&!($header['external']==16)) {
            if ($header['compression']==0) {
                $fp = @fopen($to.$header['filename'], 'wb');
                if(!$fp) return(-1);
                $size = $header['compressed_size'];

                while ($size != 0) {
                    $read_size = ($size < 2048 ? $size : 2048);
                    $buffer = fread($zip, $read_size);
                    $binary_data = pack('a'.$read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size -= $read_size;
                }
                fclose($fp);
                touch($to.$header['filename'], $header['mtime']);
            }
            else {
                $fp = @fopen($to.$header['filename'].'.gz','wb');
                if(!$fp) return(-1);
                $binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']),
                        Chr(0x00), time(), Chr(0x00), Chr(3));

                fwrite($fp, $binary_data, 10);
                $size = $header['compressed_size'];

                while ($size != 0) {
                    $read_size = ($size < 1024 ? $size : 1024);
                    $buffer = fread($zip, $read_size);
                    $binary_data = pack('a'.$read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size -= $read_size;
                }

                $binary_data = pack('VV', $header['crc'], $header['size']);
                fwrite($fp, $binary_data,8);
                fclose($fp);

                $gzp = @gzopen($to.$header['filename'].'.gz','rb');
                if(!$gzp)return false;
                if(!$gzp) return(-2);
                $fp = @fopen($to.$header['filename'],'wb');
                if(!$fp) return(-1);
                $size = $header['size'];

                while ($size != 0) {
                    $read_size = ($size < 2048 ? $size : 2048);
                    $buffer = gzread($gzp, $read_size);
                    $binary_data = pack('a'.$read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size -= $read_size;
                }
                fclose($fp);
                gzclose($gzp);

                touch($to.$header['filename'], $header['mtime']);
                @unlink($to.$header['filename'].'.gz');

            }
        }
        return true;
    }

    function zip_dir($dirs, $zipfilename) {
        if(is_array($dirs)) {
            foreach($dirs as $key=>$dir) {
                if(is_dir($dir)) {
                    $this->dir_Tree($dir);
                }
            }
        }else {
            $this->dir_Tree($dirs);
        }
        $out = $this->get_file();
        $fp = fopen($zipfilename, "wb");
        fwrite($fp, $out, strlen($out));
        fclose($fp);
    }

    function dir_Tree($directory,$zipdir='') {
        $myDir=dir($directory);
        while($file=$myDir->read()) {
            if($file=="." || $file=="..") {
                continue;
            }
            $pathfile=$directory.'/'.$file;
            $zipfile=$zipdir ? $zipdir.'/'.$file : $file;
            if(is_dir($pathfile)) {
                $this->dir_Tree($pathfile,$zipfile);
            }else {
                $filecontent = file_get_contents($pathfile);
                $this -> add_File($filecontent, $zipfile);
            }
        }
        $myDir->close();
    }

}
?>